Paster



Oct. 21, 1941. J. w. LEARY 2,

PA STER Fi'led'July 1, 1958 12 Sheets-Sheefll FIG I INVENTOR JAMES W. LERY.

ATTORNEY Filed July 1, 1938 2 Sheets-Sheet 2 FIG. 4

JAMES w 'EARY I A ORNEY Patented Oct. 21, 1941 UNITED STATES PATENTOFFICE PASTER James W. Leary, Bloomfield, N. J., assignor to AmericanMachine and Foundry Company, a corporation of New Jersey ApplicationJuly 1, 1938, Serial N0. 216,885

6 Claims. (Cl. 91-50) This invention relates to a pasting device of thecharacter utilized in such machines as rodforming cigarette machines,and relates especial ly to a device for pasting the lengthwise marginalseam of a cigarette paper web, and more particularly to the type ofcigarette machine paster empolying a feed pump of the intermeshing geartype, as illustrated in Letters Patent to Bronander et al., No.1,992,736, and in applicant's co-pending application, Serial No. 9,477,which has matured into Letters Patent No. 2,130,689, issued September20, 1938.

An outstanding characteristic of the preferred type of cigarette machinepaster disclosed in the last-named application is found in thecombination with a paste reservoir of a delivery duct leading from thereservoir and having an extrusion orifice, mechanism coacting with saidreservoir to force an oversupply of paste from the reservoir throughsaid duct toward said orifice,

devices providing a return conduit between said duct and the reservoir,at the pressure side of the orifice, and a relief valve controlling thereturn flow of any oversupply of paste through the return conduit tosaid reservoir whereby any excess of paste at the orifice will berelieved.

In my aforesaid application, substantial advantages over the prior artrepresented by a paste feed of the Bronander type having a plurality ofsets of feeding gears were achieved by my pro- I by which the pasteextruded at the discharge orifice of the delivery duct will be fed moreregularly and applied more efficiently to the marginal seam of theadvancing web of cigarette paper than has been possible with a cigarettemachine paster of conventional structure.

In carrying into effect this object, the invention provides an improvedform of transfer means interposed between the discharge orifice of thedelivery duct and the seam-pasting wheel; also an improved and readilyattachable and detachable gate device for controlling the dimensions ofthe stream of paste to be supplied, including 'also means for effectingreadily the adjustments required for regulating to a desired size theribbon of paste which is extruded to a transfer wheel and thence to thepasting roll.

Other objects and features of the invention will appear as thedescription of the particular physical embodiment selected to illustratethe invention progresses.

In the accompanying drawings, like characters of reference have beenapplied to corresponding parts throughout the several views which makeup the drawings, in which:

Fig. 1 is a view in plan of a cigarette machine paster in theconstruction of which the present invention has been embodied;

Fig. 2 is a fragmentary detail view in vertical section taken upon theline 2-2 of Fig. 1, on a larger scale; i

Fig. 3 is a fragmentary detail view in vertical section, with partsshown in elevation, taken upon the line 3-3 of Fig. 1; and

Fig. 4 is a view in end elevation of the parts shown in Fig. 3, lookingfrom right to left on Fig. 1.

In the now-preferred embodiment of the invention selected forillustration and description, the part designated by the referencecharacter I 0 is a paste receptacle formed at its lower portion with alug ll upon which is mounted a housing l2 provided with a chamber 13 incommunication with an opening in the bottom of the receptacle 10 (Fig.3).

Within the chamber I3 is disposed a pump constituted by intermeshinggears l4 and IS, the upper portions of which rotate divergently when thepump is in use, and the teeth of this pair of gears scoop the paste inpredetermined amounts from the paste lying in the V-shaped space betweenthe upper portions of the gears.

At their under portions, the paste carried around and down by the gearteeth is delivered under pressure through a delivery duct l6 and througha discharge orifice 52 to a transfer wheel I! bv which the paste streamso constituted is transferred to a rotating paste wheel ill by which itis applied to the appropriate lengthwise seam margin 8 of the cigarettepaper web 0.

To actuate the pump-gear-couple, a horizontal drive shaft 29 isprovided, supported by the lug H and coupled to another horizontal shaft2| mounted in bearings of a gear housing 22 (Fig. l) the shaft 2|driving the gear couple l4-|5 and being driven in turn by a gear 23meshing with a gear 24 mounted on a shaft 25 also supported by bearingsof housing 22.

The hub 25 of gear 24 contains a standard friction clutch (not shown)which can be conchine (not shown). I Upon a vertical shaft 3| supportedby bearings" speed of the pump gears I4 and I5 creates a high pressurein the duct I6 and thereby forces the paste against a spring-mountedplunger 65, which of a bracket 32 mounted on the housing 22, is'l ,1fastened a bevel gear 33 meshing with. a.bevel gear 34 mounted on ahorizontal shaft 35. which.

is coupled with a shaft 36 carrying a known form of transfer Wheel I'I.Shaft 36 is supportied in bearing lugs 31 of housing I2. Bracket 32 isequipped with an arm 38 holding a vertical. stud 39 to which isadjustably clamped a forked bracket 49 supporting'the rotating pastewheel I8; From supporting bracket 32' extends a lug 4| supporting anadjustablestop screw .42 contacting the paste wheel-supportingv bracket40. .On the gear driving shaft 29 is also mounted-a spiral gear 43(Fig. 1) meshing with a spiral gear 44 atj-' tached, to a vertical shaft45 supported by bearings on lug II (Fig. 3). The upper portion of theshaft 45 extends into the paste receptacle I6 and carries a propeller 46andan agitator-41. While the propeller 46 assures the constant supplyofpasteto the pump, gears I4 and I5, the agitator 41 serves concurrently.the purposeqof continuously stirring the column of paste P in thereceptacleglfl. As illustratedin Fig. 3, the receptacle I 6 can beequipped with an extension 48 which can easily be attached theretoinjcase, a heavier paste, such as starch, etc.-, isto be used. Undersuch conditions, it is desirable to provide a weight 49, resting uponsaid paste. Preferably this Weightis of annular form, as illustrated,and mounted to slide upon a post I45 carriedwith, and rotated by, thehub of agitator. 41 and-the propeller 46.

The duct I6 communicates by means of ahole in a leather washer 50 (Fig.3), with a paste guide I2, and the thumb screw engages with an open slotof a flange 51 mounted on the upper portion of the paste guide plate 5I. To the upper portion of the latter is fastened another flange 58which with its open slot engages with a vertical stud 59 held by thehousing I2. Flange 58, and therewith paste guide plate 5|, are heldyieldingly in place by means of a spring 69 pressing flange 58 against acollar 6| (Fig. 3) of stud 59. By lifting a lock bar 62 slidably'pinnedto the upper portion of the stud 59', the spring pressure upon flange 58can be quickly released, and the leather washer 50, paste guide plate5I- and paste control plate 54 can be removed easily for cleaningpurposes, etc.

A thumb screw 53 is held by means of a bar 56 attached to lugs 3'Iofhousing is pushed back by said pressure and allows the paste to enterby-pass channels 66 and 61 in housing I2 (Fig. 2). By-pass channel 61 isconnected to a refill chamber 68 facing the teeth of pump gear I4. Theexcess paste, which is forced through the pump gears and not allowed tobe carried away by the transfer wheel, due to the action of the gate 54,is forced back under pressure against the spring plunger 65 throughbyjpass 6'I68 and is forced into the empty teeth of pump gears and I5.The result is that a solid and even paste stream is delivered to thepaper lap of the cigarette rod at all times, avoiding an insufficientpaste supply, which heretofore was a common ailment of high speedcigarette machines. Of course, when no pressure is created in channelI6, the plunger 65 remains in its seat in by-pass channel 66 and allowsno paste to pass through the latter. T-1- Plunger 65 isslidablysupported by a threaded bushing 69 supported by housing I2. Saidplung-ler is also provided with a tension spring I0 (Fig; 2) the tensionof which is adjustable .readily'by means of turning the hand knob'IIattached to bushing 69. A look flange I2 holds the latter in the desiredposition. To one of the lugs 31, is

also-adjustably attached a scraper plateI3 0011-1 tacting the rotatingpaste wheel I8 and scraping any remaining paste off the latter (Fig.1)To the bottom portion of the housing I2 is also fastened a scraper plateI4 contacting the transfer wheel II. Said plate serves the purpose ofscraping any remaining paste of the transferwheel I I before a new pastestream is delivered upon'the same. In order to assure proper and quickaligning of the driving and pasting mechanism, lug II is equipped with aguide shaft I5 entering a hub ;'i6 of housing 22 (Fig. 1). It-will benoted that the transfer wheel I1 is not contact with any mass of paste,and that the strip of .paste extruded from the orifice 52 issubstantially narrower than the width of the transfer -Wheel,'so thatthere is no deposit of paste on the transfer wheel except where thestrip'of desired width is fed tothe wheel. It'is further to be notedthat the paste delivered by the'gear pump, from-the supply inthe'reservoir to the orifice 52, is several times in excess-of thatrequired for delivery to form the strip on the transfer wheel. This notonly insures the supply of a strip having uniform characteristics forpastingpurposes, butalso insures an effective return supply to aid inavoiding voids in the gear pump, as: already described.

The invention above described may' be em bodied in various modifiedforms of construction within the scope of theclaims, for the particularphysical embodiment selected to illustrate the invention, is but oneofmany possible concrete em bodiments of the same. The invention isnot," therefore, to be restricted to the precise details of thestructure shown and described.

What iszclaimed is: 1 I -1. In a paste! for a cigarette machine and the1 like, the "combinationwith a paste reservoir, a housing, and adelivery duct having a discharge orifice, of means for supplying pastefrom said reservoir in a stream through said duct to said orifice, atransfer'wheel disposed to receive a strip of paste from said stream, aslide Valve member having a gateway slot to delimit the maximumcross-sectional area of said stream, restricting it to strip size, asliding gate member to control the extent to which said slot is opened,and means to support said slide valve and sliding gate members upon saidhousing.

2. In a paster for a cigarette machine and the like, the combinationwith a paste reservoir, a housing, and a delivery duct having anorifice, of means for supplying paste from said reservoir in a streamthrough said duct to said orifice, a transfer wheel disposed to receivea strip of paste from said stream, a slide valve member having a gatewayslot to delimit the maximum crosssectional area of said stream, reducingit to strip size, a sliding gate member to regulate the opening of saidslot, and a mounting supported by said housing and on which said membersare carried, constituting with said members a unitary structureseparable as such from said housing.

3. A paster device having the features claimed in claim 2, in whichprovision is made of a post provided with means by which it may besecured in adjusted position upon said housing, a crosshead havingrotatable connections with said post, permitting axial movement of thepost relatively to the cross-head, said cross-head and post constitutingsaid means to support said slide valve and sliding gate members uponsaid housing.

4. A paster of the class described, having the features claimed in claim2, in which said mounting is provided with a cross-head fitted withmeans to adjust said gate member relatively to said slide-valve member,and said housing is provided with a bracket and binding screw to holdsaid mounting in readily attachable and detachable relation with saidhousing.

5. A paster of the class described, having the features claimed in claim2, in which said mounting is provided with a cross-head fitted withmeans to adjust said gate member relatively to said slide-valve member,and said housing is provided with a bracket and binding screw to holdsaid mounting in readily attachable and detachable relation with saidhousing, said slide valve having a sealing means provided with anorifice adapted to pass paste from the discharge orifice of saiddelivery duct to said gateway slot.

6. A paster of the class described, having the features claimed in claim2, in which provision is made of a post adapted to be supported bythreaded engagement with a part carried by said housing, a cross-headtransfixed vertically by said post, and adapted to be moved verticallyby rotation of the post to adjust said slide-valve, a spring coiledaround said post and arranged to bias said cross-head downwardly, and atrip lever at the upper end of said post, said trip lever being movableat will to tension and to relax said spring.

JAMES W. LEARY.

